Fiee geate



(No Model.) I ,2 Sheets-Sheet 1. B. OARD.

FIRE GRATE.

No. 306,218. Patented 0012.7, 1884.

Z/WE/VTU (No Model.) 2 Shets-Sl1eet 2.

. B. OARD.

FIRE GRATE. Nov 306,218. Patented Oct. 7, 1884.

WTNEE'EEE/ lUNrTEn STATns PATENT EDYVARD CARD, OF lAlVTUOKET, RHODEISLAXD.

FlRE-GRATE.

EBP ECIFICATION forming part of Letters Patent No. 306,218, datedOctober 7, 188%.

Application filed December 21, 188R. 1N0 model.)

To all whom it may concern.-

Be it known that I, EDWARD CARD, of Fawtuekct, in the county ofProvidence and State of Rhode Island, have invented certain new anduseful Improvements in Fire-Grates; and I do hereby declare that thefollowing specifition, taken in connection with the drawings making apart of the same, is a full, clear, and exact description thereof.

Figure l is a top View of the grate proper. Fig. 2 represents anagitator which is combined with said grate. Figs. 3 and 4 arerespectively a view in section and aside view. Fig. 5 is a transversesection showing two of the grate-bars.

The purpose of my invention is to construct a grate suitable for ranges,stoves, and furnaces generally, wherein the individual grate bars shallbe capable of having an up-anddown movement given to theminsubstantially vertical planes, for the purpose of agitating and breakingup the body of fuel which is supported in the fire-chamber by thegratebars, and also to give a rotary movement to each bar at the sametime, so as to grind the spent coal, slag, and ashes, to facilitatetheir easydischarge through the grate-bars.

1n the drawings, A represents a stationary grate-frame of commonconstruction, and which fits in the usual way the bottom of thefire-chamber or receptacle for the burning fuel.

I; represents a tilting grate-frame, which is mounted in the surroundingframe A, and supported by pintles a, which rest in suitable journals,1), cast in the grate-frame, as represented at Figs. 1 and 2. The frontone of these pintles extends through the casing of the stove, and issuitably squared, to allow of a handle to be applied thereto for thepurpose of turning over the grate-frame B when it is desired to emptythe fire-chamber of its contents, the said pintlcs a being located atthe extremities of the central longitudinal axis of the grate-frame B.Thus far the construction is similar to stove-grates commonly in use.The gratebars G are in this instance arranged transversely of thegrate-frame B. Each bar is furnished with a series of circular disks, 0,made integral with the bars, which maybe arranged at equal distancesapart, as shown at Figs. 1 and 5. These disks, however, are preferablyso located on their respective bars that those upon any one of the barswill extend into the spaces between the disks upon the next adjoiningbars, as clearly indicated at Fig. 1, and it is immaterial whether thedisks on each bar are at uniform distances apart, so long as therelation of the disks on one bar to the next one in the series is suchthat upon the agitation of the bars in vertical planes, or upon therevolution of them on their axes, the disks will cut into or will grindthe ashes or spent fuel resting upon the grate. Preferably eachgrate-bar has its ends extended so as to form a cylindrical shaft oraxle, d, Fig. 4, and these cylindrical portions of the gratebars enterelongated vertical slots 0, formed in the sides of the grate-frame B, asshown at Fig. 4, so as to allow of a free movement up and down of suchgrate-bars in such slots.

The whole series of gratebars C are kept in position in the grate-frameB by means of a supplemental grate-frame, D, (shown at Fig. 2,) andwhich serves as the agitator of the grate-bars. The relation of thissupplemental grate-frame D to the series of grate-bars in theperformance of its office of confining the ends of the grate-bars withintheir respective slots in the frame B is shown at Fig. 4. Thissupplemental grate-frame D is confined to the grate-frameB, so as toform apart thereof; but it is nevertheless capable of receivingalongitudinal sliding movement relatively to the grate-frame B; or, ifthe supplemental grateframe D is fixed in position, the grateframeB,with its series of grate-bars 0, should be made capable of receiving alongitudinal sliding movement relatively thereto. In the presentinstance the supplemental grateframe D is represented as the slidingmember of the structure, which is composed of itself and the grateframeB with its series of grate-bars, and it is combined with suchgrate-frame B by means of the longitudinally-extending rods f, Figs. 1and 4, which work in guiding-holes made in ear-pieces Figs. 2 and4,which depend from the under side of the four corners of the grateframe B.

It is obvious from the foregoing that when the supplemental grateframe Dis in the position represented at Fig. 4 the axles of the grate-barswill. rest upon the top surface of I the supplemental frame 1), for thereason that the spaces between the bars h of such grateframe, Figs. 1and 2, are wide enough to allow a considerable segment of the disks tofall into them. WVhen, however, the frame D is made to slide to and frorelatively to the grate-frame B, or when the frame 13 is made to sliderelatively to the frame D,the effect will be to cause the whole seriesof .loose grate-bars O to alternately rise and fall in vertical planes,and at the same time, if the bars have axle-formed ends, as shown, theywill be rotated on their axes, and in the one case the thin edges of thedisks 0 will cut like knives into the debris in the fire-chamber, and inthe other case they will, in addition, be revolved on their axes, so asto exert a tendency to pulverize it by grinding.

P, Fig. 4, represents a socket in the supplemental frame D for theinsertion of a handle, to enable a reciprocating movement to be given tothe'supplemental frame D.

It is apparent that the grate-bars may be arranged, if preferred,parallel with the longitudinal axis of the grate, instead of beingarranged transversely with such axis, in which case the agitator shouldbe correspondingly changed in position, so as to be vibrated to and 1fro-in the direction of the transverse axis of the grate. 7 s

Vhat I claim as my invention, and desire to secure by Letters Patent,is-

1. The improved grate consisting of a series of loose grate-barsconstructed with cutters or slicers, a frame in which such grate-barsare mounted in keepers therein, so as to allow of their beingalternately raised and lowered,and a supplemental grated frame oragitator, which latter frame and the supporting-frame of the grate-barsare movable relatively to each other to agitate the grate-bars havingthe cutters, substantially as specified.

2. The improved grate consisting of a series of loose grate-barsconstructed with cutters or slicers and with axle ends to the bars, aframe in which such grate-bars are journaled, and a supplemental gratedframe or agitator, which latter frame and the supporting-frame of thegratebars are movable relatively to each other, to enable the bars andtheir slicers to be rotated for grinding the debris in the fireehamber,substantially as described.

EDW'AR-D GAR-D.

\Vitnesses:

W. H. THURSTON, S. J. MURPHY.

